How many bytes does Unicode use?

Unicode uses a variable-length encoding system, with the most common being UTF-8, UTF-16, and UTF-32. In UTF-8, characters can use 1 to 4 bytes; in UTF-16, they typically use 2 or 4 bytes; and in UTF-32, each character uses a fixed 4 bytes. This allows Unicode to represent the vast array of characters from different languages and symbols.